Mushroom Wild Rice Frittata

Name: Mushroom & Wild Rice Frittata
Ingredients: 1/2 teaspoon freshly ground pepper, divided; 1/4 teaspoon ground nutmeg; 1/2 cup finely shredded Parmesan cheese; 1/2 cup wild rice (see Note), rinsed; 1 tablespoon minced fresh rosemary or 1 teaspoon dried; 2 tablespoons chopped fresh parsley; 4 thin slices prosciutto (about 2 ounces), chopped; 1 pound mixed mushrooms (cremini, white button, shiitake), sliced; 2 large egg whites; Wild Rice; 1/8 teaspoon salt Frittata; 2 teaspoons extra-virgin olive oil; 2 cups water; 1/2 teaspoon salt, divided; 5 large eggs; 1 cup chopped red onion